J_1BT001WV maintenance interface cannot be linked because of IMG link

Am trying to regenerate the TMG of table J_1BT001WV as per the note: "831887 - Business Place Plant assignment is not saved".

But when i try to delete the TMG, am getting the following error:

"J_1BT001WV maintenance interface cannot be linked because of IMG link".

When i see the long text, following is the detailed explanation:

J_1BT001WV maintenance interface cannot be deleted because of IMG link

Message No. SV440

Diagnosis

The maintenance interface for J_1BT001WV cannot be deleted because it is linked to IMG.

System Response

Maintenance dialog J_1BT001WV was not deleted.

Procedure

1. Change the IMG book(s). See the maintenance object description for maintenance dialog J_1BT001WV under Subobjects.2. Delete the IMG link in the maintenance object description under Subobjects and then delete the maintenance dialog.

I even went to SIMGH-> environment->Maintain object proceesing and deleted the link.